<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31420888</termId><termName>chalk sticks</termName><termType>PT</termType><termNote><![CDATA[ Slender, compressed cylinders of material often made from calcium sulfate in its dihydrate form, gypsum. Most often used to write on blackboards or chalkboards in classroom contexts, but also for many other marking purposes. ]]></termNote><termCreatedDate>2026-03-30 20:53:23</termCreatedDate><relation><relationType>UF</relationType><termId>31420889</termId><termName>chalk</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31420890</termId><termName>chalk stick</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31420891</termId><termName>sticks, chalk</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31386133</termId><termName>drafting, drawing and writing equipment by specific type</termName><termType>PT</termType></relation></term>  </Zthes>